Flash

: Originally Barry's sidekick, Kid Flash , Wally eventually took up the mantle after Barry's apparent death in a multiversal crisis, becoming one of the most powerful versions of the hero. The Flashpoint Paradox

One of the most defining stories in Flash history occurs when Barry uses his speed to travel back in time to prevent his mother's murder. While he succeeds in saving her, the "butterfly effect" ripples through time, creating a dark, broken reality known as where the Justice League never formed and the world is on the brink of destruction. : Originally Barry's sidekick, Kid Flash , Wally

: The original Flash of the 1940s, who gained his powers from "hard water fumes" and wore a winged helmet inspired by the god Mercury. : Originally Barry's sidekick